Image Acquisition Control AW00097603000
90 Basler aviator GigE
7.7 Acquisition Monitoring Tools
7.7.1 The Exposure Active Signal
The camera can provide an "exposure active" (ExpAc) output signal. The signal goes high when
the exposure time for each frame acquisition begins and goes low when the exposure time ends as
shown in Figure 27. This signal can be used as a flash trigger and is also useful when you are
operating a system where either the camera or the object being imaged is movable. For example,
assume that the camera is mounted on an arm mechanism and that the mechanism can move the
camera to view different portions of a product assembly. Typically, you do not want the camera to
move during exposure. In this case, you can monitor the ExpAc signal to know when exposure is
taking place and thus know when to avoid moving the camera.
The exposure active output signal can be assigned to camera output line 1, output line 2, output
line 3, or output line 4. For more information about changing which camera output signal is assigned
to which output line, see Section 6.2 on page 49.
For more information about the electrical characteristics of the camera’s output lines, see
Section 5.8 on page 41.
When you use the exposure active signal, be aware that there is a delay in the
rise and the fall of the signal in relation to the start and the end of exposure.
See Figure 27 for details.
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